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1 | /* av.c |
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2 | * |
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3 | * Copyright (c) 1991-1994, Larry Wall |
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4 | * |
5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. |
7 | * |
a0d0e21e |
8 | */ |
9 | |
10 | /* |
11 | * "...for the Entwives desired order, and plenty, and peace (by which they |
12 | * meant that things should remain where they had set them)." --Treebeard |
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13 | */ |
14 | |
15 | #include "EXTERN.h" |
16 | #include "perl.h" |
17 | |
a0d0e21e |
18 | static void av_reify _((AV* av)); |
19 | |
20 | static void |
21 | av_reify(av) |
22 | AV* av; |
23 | { |
24 | I32 key; |
25 | SV* sv; |
26 | |
27 | key = AvMAX(av) + 1; |
28 | while (key > AvFILL(av) + 1) |
29 | AvARRAY(av)[--key] = &sv_undef; |
30 | while (key) { |
31 | sv = AvARRAY(av)[--key]; |
32 | assert(sv); |
33 | if (sv != &sv_undef) |
34 | (void)SvREFCNT_inc(sv); |
35 | } |
36 | AvREAL_on(av); |
37 | } |
38 | |
39 | void |
40 | av_extend(av,key) |
41 | AV *av; |
42 | I32 key; |
43 | { |
44 | if (key > AvMAX(av)) { |
45 | SV** ary; |
46 | I32 tmp; |
47 | I32 newmax; |
48 | |
49 | if (AvALLOC(av) != AvARRAY(av)) { |
50 | ary = AvALLOC(av) + AvFILL(av) + 1; |
51 | tmp = AvARRAY(av) - AvALLOC(av); |
52 | Move(AvARRAY(av), AvALLOC(av), AvFILL(av)+1, SV*); |
53 | AvMAX(av) += tmp; |
54 | SvPVX(av) = (char*)AvALLOC(av); |
55 | if (AvREAL(av)) { |
56 | while (tmp) |
57 | ary[--tmp] = &sv_undef; |
58 | } |
59 | |
60 | if (key > AvMAX(av) - 10) { |
61 | newmax = key + AvMAX(av); |
62 | goto resize; |
63 | } |
64 | } |
65 | else { |
66 | if (AvALLOC(av)) { |
c07a80fd |
67 | #ifndef STRANGE_MALLOC |
4633a7c4 |
68 | U32 bytes; |
c07a80fd |
69 | #endif |
4633a7c4 |
70 | |
a0d0e21e |
71 | newmax = key + AvMAX(av) / 5; |
72 | resize: |
4633a7c4 |
73 | #ifdef STRANGE_MALLOC |
a0d0e21e |
74 | Renew(AvALLOC(av),newmax+1, SV*); |
4633a7c4 |
75 | #else |
76 | bytes = (newmax + 1) * sizeof(SV*); |
77 | #define MALLOC_OVERHEAD 16 |
78 | tmp = MALLOC_OVERHEAD; |
79 | while (tmp - MALLOC_OVERHEAD < bytes) |
80 | tmp += tmp; |
81 | tmp -= MALLOC_OVERHEAD; |
82 | tmp /= sizeof(SV*); |
83 | assert(tmp > newmax); |
84 | newmax = tmp - 1; |
85 | New(2,ary, newmax+1, SV*); |
86 | Copy(AvALLOC(av), ary, AvMAX(av)+1, SV*); |
c07a80fd |
87 | if (AvMAX(av) > 64 && !nice_chunk) { |
88 | nice_chunk = (char*)AvALLOC(av); |
89 | nice_chunk_size = (AvMAX(av) + 1) * sizeof(SV*); |
90 | } |
4633a7c4 |
91 | else |
92 | Safefree(AvALLOC(av)); |
93 | AvALLOC(av) = ary; |
94 | #endif |
a0d0e21e |
95 | ary = AvALLOC(av) + AvMAX(av) + 1; |
96 | tmp = newmax - AvMAX(av); |
7d55f622 |
97 | if (av == curstack) { /* Oops, grew stack (via av_store()?) */ |
a0d0e21e |
98 | stack_sp = AvALLOC(av) + (stack_sp - stack_base); |
99 | stack_base = AvALLOC(av); |
100 | stack_max = stack_base + newmax; |
101 | } |
102 | } |
103 | else { |
104 | newmax = key < 4 ? 4 : key; |
105 | New(2,AvALLOC(av), newmax+1, SV*); |
106 | ary = AvALLOC(av) + 1; |
107 | tmp = newmax; |
108 | AvALLOC(av)[0] = &sv_undef; /* For the stacks */ |
109 | } |
110 | if (AvREAL(av)) { |
111 | while (tmp) |
112 | ary[--tmp] = &sv_undef; |
113 | } |
114 | |
115 | SvPVX(av) = (char*)AvALLOC(av); |
116 | AvMAX(av) = newmax; |
117 | } |
118 | } |
119 | } |
120 | |
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121 | SV** |
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122 | av_fetch(av,key,lval) |
123 | register AV *av; |
79072805 |
124 | I32 key; |
125 | I32 lval; |
126 | { |
127 | SV *sv; |
128 | |
a0d0e21e |
129 | if (!av) |
130 | return 0; |
131 | |
8990e307 |
132 | if (SvRMAGICAL(av)) { |
463ee0b2 |
133 | if (mg_find((SV*)av,'P')) { |
8990e307 |
134 | sv = sv_newmortal(); |
463ee0b2 |
135 | mg_copy((SV*)av, sv, 0, key); |
463ee0b2 |
136 | Sv = sv; |
137 | return &Sv; |
138 | } |
139 | } |
140 | |
a0d0e21e |
141 | if (key < 0) { |
142 | key += AvFILL(av) + 1; |
143 | if (key < 0) |
144 | return 0; |
145 | } |
146 | else if (key > AvFILL(av)) { |
147 | if (!lval) |
148 | return 0; |
149 | if (AvREALISH(av)) |
150 | sv = NEWSV(5,0); |
151 | else |
152 | sv = sv_newmortal(); |
153 | return av_store(av,key,sv); |
79072805 |
154 | } |
a0d0e21e |
155 | if (AvARRAY(av)[key] == &sv_undef) { |
4dbf4341 |
156 | emptyness: |
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157 | if (lval) { |
158 | sv = NEWSV(6,0); |
463ee0b2 |
159 | return av_store(av,key,sv); |
79072805 |
160 | } |
161 | return 0; |
162 | } |
4dbf4341 |
163 | else if (AvREIFY(av) |
164 | && (!AvARRAY(av)[key] /* eg. @_ could have freed elts */ |
165 | || SvTYPE(AvARRAY(av)[key]) == SVTYPEMASK)) { |
166 | AvARRAY(av)[key] = &sv_undef; /* 1/2 reify */ |
167 | goto emptyness; |
168 | } |
463ee0b2 |
169 | return &AvARRAY(av)[key]; |
79072805 |
170 | } |
171 | |
172 | SV** |
463ee0b2 |
173 | av_store(av,key,val) |
174 | register AV *av; |
79072805 |
175 | I32 key; |
176 | SV *val; |
177 | { |
79072805 |
178 | SV** ary; |
179 | |
a0d0e21e |
180 | if (!av) |
181 | return 0; |
43fcc5d2 |
182 | if (!val) |
183 | val = &sv_undef; |
463ee0b2 |
184 | |
8990e307 |
185 | if (SvRMAGICAL(av)) { |
463ee0b2 |
186 | if (mg_find((SV*)av,'P')) { |
43fcc5d2 |
187 | if (val != &sv_undef) |
188 | mg_copy((SV*)av, val, 0, key); |
463ee0b2 |
189 | return 0; |
190 | } |
191 | } |
192 | |
a0d0e21e |
193 | if (key < 0) { |
194 | key += AvFILL(av) + 1; |
195 | if (key < 0) |
196 | return 0; |
79072805 |
197 | } |
43fcc5d2 |
198 | if (SvREADONLY(av) && key >= AvFILL(av)) |
199 | croak(no_modify); |
a0d0e21e |
200 | if (key > AvMAX(av)) |
201 | av_extend(av,key); |
202 | if (AvREIFY(av)) |
203 | av_reify(av); |
204 | |
463ee0b2 |
205 | ary = AvARRAY(av); |
a0d0e21e |
206 | if (AvFILL(av) < key) { |
207 | if (!AvREAL(av)) { |
7d55f622 |
208 | if (av == curstack && key > stack_sp - stack_base) |
a0d0e21e |
209 | stack_sp = stack_base + key; /* XPUSH in disguise */ |
210 | do |
211 | ary[++AvFILL(av)] = &sv_undef; |
212 | while (AvFILL(av) < key); |
79072805 |
213 | } |
a0d0e21e |
214 | AvFILL(av) = key; |
79072805 |
215 | } |
a0d0e21e |
216 | else if (AvREAL(av)) |
217 | SvREFCNT_dec(ary[key]); |
79072805 |
218 | ary[key] = val; |
8990e307 |
219 | if (SvSMAGICAL(av)) { |
a0d0e21e |
220 | if (val != &sv_undef) { |
221 | MAGIC* mg = SvMAGIC(av); |
222 | sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key); |
223 | } |
463ee0b2 |
224 | mg_set((SV*)av); |
225 | } |
79072805 |
226 | return &ary[key]; |
227 | } |
228 | |
229 | AV * |
230 | newAV() |
231 | { |
463ee0b2 |
232 | register AV *av; |
79072805 |
233 | |
a0d0e21e |
234 | av = (AV*)NEWSV(3,0); |
235 | sv_upgrade((SV *)av, SVt_PVAV); |
463ee0b2 |
236 | AvREAL_on(av); |
237 | AvALLOC(av) = 0; |
238 | SvPVX(av) = 0; |
239 | AvMAX(av) = AvFILL(av) = -1; |
240 | return av; |
79072805 |
241 | } |
242 | |
243 | AV * |
244 | av_make(size,strp) |
245 | register I32 size; |
246 | register SV **strp; |
247 | { |
463ee0b2 |
248 | register AV *av; |
79072805 |
249 | register I32 i; |
250 | register SV** ary; |
251 | |
a0d0e21e |
252 | av = (AV*)NEWSV(8,0); |
253 | sv_upgrade((SV *) av,SVt_PVAV); |
79072805 |
254 | New(4,ary,size+1,SV*); |
463ee0b2 |
255 | AvALLOC(av) = ary; |
a0d0e21e |
256 | AvFLAGS(av) = AVf_REAL; |
463ee0b2 |
257 | SvPVX(av) = (char*)ary; |
258 | AvFILL(av) = size - 1; |
259 | AvMAX(av) = size - 1; |
79072805 |
260 | for (i = 0; i < size; i++) { |
a0d0e21e |
261 | assert (*strp); |
262 | ary[i] = NEWSV(7,0); |
263 | sv_setsv(ary[i], *strp); |
79072805 |
264 | strp++; |
265 | } |
463ee0b2 |
266 | return av; |
79072805 |
267 | } |
268 | |
269 | AV * |
270 | av_fake(size,strp) |
271 | register I32 size; |
272 | register SV **strp; |
273 | { |
463ee0b2 |
274 | register AV *av; |
79072805 |
275 | register SV** ary; |
276 | |
a0d0e21e |
277 | av = (AV*)NEWSV(9,0); |
278 | sv_upgrade((SV *)av, SVt_PVAV); |
79072805 |
279 | New(4,ary,size+1,SV*); |
463ee0b2 |
280 | AvALLOC(av) = ary; |
79072805 |
281 | Copy(strp,ary,size,SV*); |
a0d0e21e |
282 | AvFLAGS(av) = AVf_REIFY; |
463ee0b2 |
283 | SvPVX(av) = (char*)ary; |
284 | AvFILL(av) = size - 1; |
285 | AvMAX(av) = size - 1; |
79072805 |
286 | while (size--) { |
a0d0e21e |
287 | assert (*strp); |
288 | SvTEMP_off(*strp); |
79072805 |
289 | strp++; |
290 | } |
463ee0b2 |
291 | return av; |
79072805 |
292 | } |
293 | |
294 | void |
463ee0b2 |
295 | av_clear(av) |
296 | register AV *av; |
79072805 |
297 | { |
298 | register I32 key; |
a0d0e21e |
299 | SV** ary; |
79072805 |
300 | |
7d55f622 |
301 | #ifdef DEBUGGING |
302 | if (SvREFCNT(av) <= 0) { |
303 | warn("Attempt to clear deleted array"); |
304 | } |
305 | #endif |
a0d0e21e |
306 | if (!av || AvMAX(av) < 0) |
79072805 |
307 | return; |
308 | /*SUPPRESS 560*/ |
a0d0e21e |
309 | |
310 | if (AvREAL(av)) { |
311 | ary = AvARRAY(av); |
312 | key = AvFILL(av) + 1; |
313 | while (key) { |
314 | SvREFCNT_dec(ary[--key]); |
315 | ary[key] = &sv_undef; |
316 | } |
317 | } |
463ee0b2 |
318 | if (key = AvARRAY(av) - AvALLOC(av)) { |
319 | AvMAX(av) += key; |
a0d0e21e |
320 | SvPVX(av) = (char*)AvALLOC(av); |
79072805 |
321 | } |
463ee0b2 |
322 | AvFILL(av) = -1; |
79072805 |
323 | } |
324 | |
325 | void |
463ee0b2 |
326 | av_undef(av) |
327 | register AV *av; |
79072805 |
328 | { |
329 | register I32 key; |
330 | |
463ee0b2 |
331 | if (!av) |
79072805 |
332 | return; |
333 | /*SUPPRESS 560*/ |
a0d0e21e |
334 | if (AvREAL(av)) { |
335 | key = AvFILL(av) + 1; |
336 | while (key) |
337 | SvREFCNT_dec(AvARRAY(av)[--key]); |
338 | } |
463ee0b2 |
339 | Safefree(AvALLOC(av)); |
340 | AvALLOC(av) = 0; |
341 | SvPVX(av) = 0; |
342 | AvMAX(av) = AvFILL(av) = -1; |
748a9306 |
343 | if (AvARYLEN(av)) { |
344 | SvREFCNT_dec(AvARYLEN(av)); |
345 | AvARYLEN(av) = 0; |
346 | } |
79072805 |
347 | } |
348 | |
a0d0e21e |
349 | void |
463ee0b2 |
350 | av_push(av,val) |
351 | register AV *av; |
79072805 |
352 | SV *val; |
353 | { |
a0d0e21e |
354 | if (!av) |
355 | return; |
356 | av_store(av,AvFILL(av)+1,val); |
79072805 |
357 | } |
358 | |
359 | SV * |
463ee0b2 |
360 | av_pop(av) |
361 | register AV *av; |
79072805 |
362 | { |
363 | SV *retval; |
364 | |
a0d0e21e |
365 | if (!av || AvFILL(av) < 0) |
366 | return &sv_undef; |
43fcc5d2 |
367 | if (SvREADONLY(av)) |
368 | croak(no_modify); |
463ee0b2 |
369 | retval = AvARRAY(av)[AvFILL(av)]; |
a0d0e21e |
370 | AvARRAY(av)[AvFILL(av)--] = &sv_undef; |
8990e307 |
371 | if (SvSMAGICAL(av)) |
463ee0b2 |
372 | mg_set((SV*)av); |
79072805 |
373 | return retval; |
374 | } |
375 | |
376 | void |
463ee0b2 |
377 | av_unshift(av,num) |
378 | register AV *av; |
79072805 |
379 | register I32 num; |
380 | { |
381 | register I32 i; |
382 | register SV **sstr,**dstr; |
383 | |
a0d0e21e |
384 | if (!av || num <= 0) |
79072805 |
385 | return; |
43fcc5d2 |
386 | if (SvREADONLY(av)) |
387 | croak(no_modify); |
a0d0e21e |
388 | if (!AvREAL(av)) { |
389 | if (AvREIFY(av)) |
390 | av_reify(av); |
391 | else |
392 | croak("Can't unshift"); |
79072805 |
393 | } |
a0d0e21e |
394 | i = AvARRAY(av) - AvALLOC(av); |
395 | if (i) { |
396 | if (i > num) |
397 | i = num; |
398 | num -= i; |
399 | |
400 | AvMAX(av) += i; |
401 | AvFILL(av) += i; |
402 | SvPVX(av) = (char*)(AvARRAY(av) - i); |
403 | } |
404 | if (num) { |
405 | av_extend(av,AvFILL(av)+num); |
406 | AvFILL(av) += num; |
463ee0b2 |
407 | dstr = AvARRAY(av) + AvFILL(av); |
79072805 |
408 | sstr = dstr - num; |
409 | #ifdef BUGGY_MSC5 |
410 | # pragma loop_opt(off) /* don't loop-optimize the following code */ |
411 | #endif /* BUGGY_MSC5 */ |
a0d0e21e |
412 | for (i = AvFILL(av) - num; i >= 0; --i) { |
79072805 |
413 | *dstr-- = *sstr--; |
414 | #ifdef BUGGY_MSC5 |
415 | # pragma loop_opt() /* loop-optimization back to command-line setting */ |
416 | #endif /* BUGGY_MSC5 */ |
417 | } |
a0d0e21e |
418 | while (num) |
419 | AvARRAY(av)[--num] = &sv_undef; |
79072805 |
420 | } |
421 | } |
422 | |
423 | SV * |
463ee0b2 |
424 | av_shift(av) |
425 | register AV *av; |
79072805 |
426 | { |
427 | SV *retval; |
428 | |
a0d0e21e |
429 | if (!av || AvFILL(av) < 0) |
430 | return &sv_undef; |
43fcc5d2 |
431 | if (SvREADONLY(av)) |
432 | croak(no_modify); |
463ee0b2 |
433 | retval = *AvARRAY(av); |
a0d0e21e |
434 | if (AvREAL(av)) |
435 | *AvARRAY(av) = &sv_undef; |
463ee0b2 |
436 | SvPVX(av) = (char*)(AvARRAY(av) + 1); |
437 | AvMAX(av)--; |
438 | AvFILL(av)--; |
8990e307 |
439 | if (SvSMAGICAL(av)) |
463ee0b2 |
440 | mg_set((SV*)av); |
79072805 |
441 | return retval; |
442 | } |
443 | |
444 | I32 |
463ee0b2 |
445 | av_len(av) |
446 | register AV *av; |
79072805 |
447 | { |
463ee0b2 |
448 | return AvFILL(av); |
79072805 |
449 | } |
450 | |
451 | void |
463ee0b2 |
452 | av_fill(av, fill) |
453 | register AV *av; |
79072805 |
454 | I32 fill; |
455 | { |
a0d0e21e |
456 | if (!av) |
457 | croak("panic: null array"); |
79072805 |
458 | if (fill < 0) |
459 | fill = -1; |
463ee0b2 |
460 | if (fill <= AvMAX(av)) { |
a0d0e21e |
461 | I32 key = AvFILL(av); |
462 | SV** ary = AvARRAY(av); |
463 | |
464 | if (AvREAL(av)) { |
465 | while (key > fill) { |
466 | SvREFCNT_dec(ary[key]); |
467 | ary[key--] = &sv_undef; |
468 | } |
469 | } |
470 | else { |
471 | while (key < fill) |
472 | ary[++key] = &sv_undef; |
473 | } |
474 | |
463ee0b2 |
475 | AvFILL(av) = fill; |
8990e307 |
476 | if (SvSMAGICAL(av)) |
463ee0b2 |
477 | mg_set((SV*)av); |
478 | } |
a0d0e21e |
479 | else |
480 | (void)av_store(av,fill,&sv_undef); |
79072805 |
481 | } |